Electromotive Force

The difference of potential produced by an electrical source to drive a current through an external electrical circuit. The SI units of electromotive force is the volt.

The potential difference between points a and b is:
where
φa = potential at point a
φb = potential at point b
E = electric field
dl = line element

See also: Back Electromotive Force, Contact EMF, Contact Potential, Induced Electromotive Force, Volt.

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Subjects: Electronics